FA Cable

[Alwayslearningelec]

First time I'm seeing mc cable in fire alarm spec. i would imagine it has to be cheaper( labor and material) than running EMT. Guess I know have to delve into the NEC to see where it can be used FOR FIRE ALARM.

 

[ron]

I have used MC cable for fire alarm in the past in lieu of conduit where not exposed to physical damage. https://www.southwire.com/wire-cabl...rt-type-mc-fplp-fire-alarm-and-control/p/MC39

 

[infinity]

I see no real advantage to C. Above the ceiling and in the wall regular fire alarm cable can be installed in free air. Typically a stub up is used in the wall for convenience.

 

[don_resqcapt19]

I see no real advantage to C. Above the ceiling and in the wall regular fire alarm cable can be installed in free air. Typically a stub up is used in the wall for convenience.

I am reading that spec as prohibiting running the cable in free air. I see it as requiring red EMT if exposed and permitting MC where concealed.

 

[infinity]

I am reading that spec as prohibiting running the cable in free air. I see it as requiring red EMT if exposed and permitting MC where concealed.

Yes you're correct it could mean that. I would send an RFI and ask why. And what is a pathway anyway?

 

[Alwayslearningelec]

Cable is not allowed to be run free air for this job.

 

[gadfly56]

Yes you're correct it could mean that. I would send an RFI and ask why. And what is a pathway anyway?

In fire alarm, "pathway" is usually associated with circuit class and/or survivability level. The classes are A, B, C, D, E, N, and X and the levels go from 0 to 3.